William stephenson



(No Model.)

' W. STEPHENSON.

POST HOLE AUGER.

Patented Deo. 26, 1882.

N. PETERS. Phommhogmpmr. washmgmu. '1c

UNITED STATES PATENT OFFICE.

IVILLIAh'I STEPHENSON, OF HAMILTON, ONTARIO, CANADA.'

POST-HOLE AUGER.

SPECIFICATION forming part of Letters Patent No. 269,548, dated December26, 1882.

Application tiled July 5,1882. (No model.) Patented in Canada March i2,1881, No. 12,494.

T o all whom it may concern Be it known that I, WILLIAM STEPHENsoN, ofHamilton, in the county of Wentworth, in the Province of Ontario,Dominion ot' Canada, have invented certain new and useful Improvementsin Post-Hole Angers; and I do hereby declare that the following is afull, clear, and exact description of the construction and operation ofthe same, reference being had to the annexed drawings, forming part ofthis specification. A

Figure l represents a perspective view oi' my invention with the stockbroken away; Fig. 2, an inverted perspective view of Fig. l; Fig. 3, avertical central section. Y

This invention relates to improvements in angers for boring post holesin the ground, and has for its object to improve the details ofconstruction and provide a ground-auger; which is simple in constructionand very efficient in operation.

I'he object of my invention I accomplish by thc construction and unionof parts illustrated in the accompanying drawings, which I will proceedto describe in detail, afterward pointing` ont in the claims thespecific improvements which constitute my invention.

The letter A indicates the tubular stock, composed ot' gas-pipescrew-threaded at one end, as at A', to screw into'the center or hub Cof the disk C', which is threaded to receive I it; and B, the tubularhandle, secured to the stock. The disk C is made of malleable iron,provided with two openings, b b, each faced with a steel lbit or cutter,D, riveted to one side ot' each opening. The steel bits or cutters D areeach constructed with a cuttingedge, c, turned up nearly at right anglesto the bit to form a sharp cutting-.edge to cut the earth clean inboring the post-hole.

The letters cl d indicate the lateral ventilatingopenings in the hub Oand under the disk to supply air through the tubular handle and stock tothe under side of the cutting-disk; and E indicates the screw point,having threaded shank E', which is screwed into the under side of thehub of thedisk, which hub is threaded to receive it. This point is ofmal- |leable cast-iron, and is constructed with direct tapers speciallyadapted for the purpose of rapid and easy earth-boring; and it will beseen that the said screw tapers gradually on the outside from the baseto the point, the central or grooved portion from g g and the thread hbeing' constructed to gradually taper from the base at l1J to a point,e, at the extreme end. This form ot' screw-point I have foundl byexperience possesses efficient working qualities, and is capable ofboring successtully in the hardest ground with less labor and more speedthan can be done` with other post-hole angers.

I am aware of Letters Patent No. 160,648, and do not wish to beunderstood as claiming whatis therein shown and described. Myconstruction differs from it in that I form the transverse air-openingsd d directly through the under part of the hub O, and I thereby avoiddrilling lateral holes in the screw-point, whicirwould weaken and renderit liable to become easily fractured or broken.

Having thus described my invention,what I vclaim is 1. A ground-augerconsisting of a radiallyslotted disk formed integral with a hollow hub,which projects from its opposite sides, that part ot' the hub on theunder side of the disk being transversely perforated and receiving thescrew-point, and the other part of the hub on the ripper side of thedisk receiving the hollow stem havingthehollowhandle,substan tial] y asdescribed.

2. A ground-auger composed of a radially: slotted disk formed integralwith a central hollow hub, which projects from its opposite sides, eachprojecting partof the hub beinginteriorly on the under side ofthe diskbcingtransversely perforated, substantially as and for the purposedescribed.

Dated at Hamilton, Ontario, Dominion of Canada, this 29th day of Marcil,1882.

IVM. STEPHENSON.-

In presence of- JULIEN R. SEAVEY, WM. BRUCE.

screw-th readed, and th at part of the h ub formedI

